So, recently my arrow keys have gone and messed themselves up. If I'm typing a document and hit the left arrow key, instead of going back a single character, it now goes back to the beginning of the line. Earlier I was hitting loads of CTRL+(letter) shortcuts trying to find a specific function, and before that I'm pretty sure it was fine, so I might have pressed a bad shortcut. Does anyone know how to solve this, or the shortcut that activated this in the first place?
Note: Most of the shortcuts I was hitting were with letters along the top line of the keyboard.